Knee mat



FIG. 1 is a top front left isometric view of the knee mat of the present invention;

FIG. 2 is a bottom rear left isometric view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof. 

CLAIM The ornamental design for a knee mat, as shown and described. 